StaticMatrixTransform

class astropy.coordinates.StaticMatrixTransform(matrix, fromsys, tosys, priority=1, register_graph=None)

Bases: astropy.coordinates.CoordinateTransform

A coordinate transformation defined as a 3 x 3 cartesian transformation matrix.

This is distinct from DynamicMatrixTransform in that this kind of matrix is independent of frame attributes. That is, it depends only on the class of the frame.

Parameters:

matrix : array-like or callable

A 3 x 3 matrix for transforming 3-vectors. In most cases will be unitary (although this is not strictly required). If a callable, will be called with no arguments to get the matrix.

fromsys : class

The coordinate frame class to start from.

tosys : class

The coordinate frame class to transform into.

priority : number

The priority if this transform when finding the shortest coordinate tranform path - large numbers are lower priorities.

register_graph : TransformGraph or None

A graph to register this transformation with on creation, or None to leave it unregistered.

Raises:

ValueError

If the matrix is not 3 x 3

Methods Summary

__call__(fromcoord, toframe)

Methods Documentation

__call__(fromcoord, toframe)